Synthesis, characterization and ionic conductive properties of phosphorylated chitosan membranes

被引：139

作者：

Wan, Y ^{[1
]}

Creber, KAM ^{[1
]}

Peppley, B ^{[1
]}

Bui, VT ^{[1
]}

机构：

[1] Royal Mil Coll Canada, Dept Chem & Chem Engn, Kingston, ON K7K 7B4, Canada

来源：

MACROMOLECULAR CHEMISTRY AND PHYSICS | 2003年 / 204卷 / 5-6期

关键词：

chitosan; fuel cell; ionic conductivity; membranes; modification;

D O I：

10.1002/macp.200390056

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Phosphorylated chitosan membranes were prepared from the reaction of orthophosphoric acid and urea on the surface of chitosan membranes in N,N-dimethylformamide. Their ionic conductivity in the wet state was investigated. Chemical modifications contributed to improved ionic conductivities of the chitosan membranes. Compared to be unmodified chitosan membranes, it was found that hydrated phosphorylated chitosan membranes with an appropriate phosphorus content showed an increasing ionic conductivity of about one order of magnitude. The phosphorylation reaction mechanism was explained based on C-13 and P-31 NMR measurements. It was also observed that the crystallinity of the phosphorylated chitosan membranes and the corresponding swelling indices were changed pronouncedly, but these membranes did not lose either their tensile strength or thermal stability to a significant degree in comparison with the unmodified chitosan membranes.

引用

页码：850 / 858

页数：9

共 28 条

[1] SOLUTION PROPERTIES OF CHITOSANS - CONFORMATION AND CHAIN STIFFNESS OF CHITOSANS WITH DIFFERENT DEGREES OF N-ACETYLATION
ANTHONSEN, MW
VARUM, KM
SMIDSROD, O
[J]. CARBOHYDRATE POLYMERS, 1993, 22 (03) : 193 - 201
[2] Ionic conductivity of proton exchange membranes
Beattie, PD
Orfino, FP
Basura, VI
Zychowska, K
Ding, JF
Chuy, C
Schmeisser, J
Holdcroft, S
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2001, 503 (1-2): : 45 - 56
[3] BLOMEN LJM, 1993, FUEL CELL SYSTEM
[4] CHEN RH, 1996, ADV CHITIN SCI, V1, P346
[5] FURMAN HH, 1975, STANDARD METHODS CHE, V1, P818
[6] MEASUREMENT OF MEMBRANE CONDUCTIVITIES USING AN OPEN-ENDED COAXIAL PROBE
GARDNER, CL
ANANTARAMAN, AV
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1995, 395 (1-2): : 67 - 73
[7] Gottesfeld S, 1997, ADV ELECTROCHEM SCI, V5, P195, DOI DOI 10.1002/9783527616794.CH4
[8] KASAAI MR, 1998, ADV CHITIN SCI, V2, P421
[9] KATSUURA K, 1966, J CHEM SOC JPN IEC, V69, P681
[10] PROPERTIES AND SWELLING CHARACTERISTICS OF CROSS-LINKED POLY(VINYL ALCOHOL) CHITOSAN BLEND MEMBRANE
KIM, JH
KIM, JY
LEE, YM
KIM, KY
[J]. JOURNAL OF APPLIED POLYMER SCIENCE, 1992, 45 (10) : 1711 - 1717

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